Proceedings of the
World Congress on Micro and Nano Manufacturing (WCMNM 2022 )
19–22 September 2022, Lueven, Belgium
doi:10.3850/978-981-18-5180-3_RP65-0039
Ultrafast Laser Ablation of Grooves in Metals: Experimental Study and Comparison with Simulations
1KU Leuven, Department of Mechanical Engineering and Flanders Make @KU Leuven-MaPS, Celestijnenlaan 300, 3001 Leuven
2KU Leuven, Department of Materials Engineering, Diepenbeek Campus, Wetenschapspark 27, 3590 Diepenbeek, Belgium
ABSTRACT
Femtosecond (fs) laser ablation of metals is gaining popularity in surface texturing and micro-machining applications thanks to its high precision and negligible heat affected zone. fs laser ablation can be represented by the twotemperature model, where a difference between the temperature of the electrons excited by the laser pulse and the temperature of the lattice is assumed. In this work, the two-temperature model is compared against experiments for the ultrafast laser ablation of grooves created with a parallel line scanning strategy. First, the influence of the scanning direction, hatch pitch and number of passes on the groove geometry is studied. Then, the experimental results are compared with simulations. The results show that there is an interaction between the parallel lines leading to more ablation than expected by the two-temperature model.
Keywords: Femtosecond Laser Modeling, Ultrafast Laser Ablation, Laser Scanning, Stainless Steel.
1KU Leuven, Department of Mechanical Engineering and Flanders Make @KU Leuven-MaPS, Celestijnenlaan 300, 3001 Leuven
2KU Leuven, Department of Materials Engineering, Diepenbeek Campus, Wetenschapspark 27, 3590 Diepenbeek, Belgium
ABSTRACT
Femtosecond (fs) laser ablation of metals is gaining popularity in surface texturing and micro-machining applications thanks to its high precision and negligible heat affected zone. fs laser ablation can be represented by the twotemperature model, where a difference between the temperature of the electrons excited by the laser pulse and the temperature of the lattice is assumed. In this work, the two-temperature model is compared against experiments for the ultrafast laser ablation of grooves created with a parallel line scanning strategy. First, the influence of the scanning direction, hatch pitch and number of passes on the groove geometry is studied. Then, the experimental results are compared with simulations. The results show that there is an interaction between the parallel lines leading to more ablation than expected by the two-temperature model.
Keywords: Femtosecond Laser Modeling, Ultrafast Laser Ablation, Laser Scanning, Stainless Steel.
